3.It`s made from periclasite,magnesite aluminium spinel,chrome ore as raw material.
以方镁石、镁铝尖晶石、铬矿为主晶相中性耐火制品。
4.By access to information,determination methods of alumina are mainly including chrome azurol S method and aluminon method.
经查阅资料,测定铝主要方法有铬天青S法和铝试剂法。
5.The methods of chrome tannage technology and the application of studing on auxiliary agent were summarized, there were 60 pieces of refe rence documents.
综述了清洁铬鞣工艺方法及其助剂研究与应用,主要参考文献60篇.
6.Process of surface treatments include gold plating, silver plating ,nickel plating, chrome plating, tin plating, zinc plating, electrostatic painting, cataphoretic coating, aluminium oxidizing, etc.